Process for reclaiming asphalt from residuum



jby it i-s possible to reclaim and providecom m .cial asphalt-"or: pitch from the residuum oils or -matter remaining-after cracking of 1 Fl ,petrQIeumprOducts. s l

At the present-time :large masses of residu-v nm produetsconsidered wasteat cracking? still-s! This waste is material. presents a fproblem -in that itgis difiicultto dispose' of;

.} pose of this Waste matter by burning saine,

however, it'h'as n'otbeen found commercially" Heretofore attempts havel been made to: dis- .Worthhile to useg the substance as fuel ing this Wasteproductto: advantage; j

1 i h -rs d n w 'liOb m pel ov leuim cracking. stillgenerallygcontains fa very 'ilaage quantity of free acarbonr TEre e carbon is; thoroughly admixed withthe asphalt 01 pitch.

ItI s-antobject of to separate the; tree carbongfrom=the pitch and to ithen qre'duee the pitch or asphalt to such state tha't it is a commercial'asphalt; t I 511112 the; ordinary till the: tollowing stepssar generally followed; h gizqenr q iantityiof tcrude oil is] subjected 1' to brdinary distillation for Withdrawing 'va riousvolatile; oils such as" gasoline. There-I "after, the resultant mass, comprising, kero- V sene, gas 011, fuel 011 and-possibly some other substances, 1S sub ected to a cracking process.

,In'carrying" on this cracking process the substance "is introduced into a so-called crackas coke. My discovery begins here;

h Wi hd wn a hal s? treated, preferablyjby cheating; inj o'rd ,o i reduce same to;commercialasphalt. I

glvezgood results a 1 s v approxiin ately 340 degrees 4G0 g ieatedcfueloil isiadmix'ed vith the' resiaaem and this zmixtureiis stirred an'da the temp a- 5- 1 time of the entire :massis raisedto" aboi. degrees IT 1 ereupon the substances :;.}and the temperature o1a1 1 flowing ub an'ce is raisedgasiqnickly as pos;s'ib1e","to lll degr'ee's Themassis held att a ing still and the temperature thereof is raisedv 1 to a high degree: :The cracking process may, 1 j. be carried-on in any of the manners commonly} r I, employed, however; the result is invariablyp t the same namely, that thereremains. a conside'rableuquantity of residuum oil that ma'yjj be withdrawn from the still hile in a hotv or-molten state. There also remains on the; bottom of the still a quantity of carbon'known.

-Pion e s s f The residuum ml is admixed-with a quang tityof fuel oil and same are caused to flux.- Thereafter, the free carbon is separated out or precipitated inany suitable manner, for" 1 'in'a' fluid conditiom howeyer, obyiating any appreciable disturbance .yo'f; the mass Whereby the freecarbon may precipitate; and the fluid mass befwithd rawnor run fromthe-t op V of; the {devicejin which thefprocessfis being 7 carried .on. If desired the, free carbon may be precipitated or separated fromflthe 'ra inain'der ofthe heatedsubstancejby meansiof centni-stugal action. Any-suitable'deviee'fiiay i be employed for applyingmentrifugal foie .,e0 fie a; m s f i duum p bd ct h e i a ,fnolten state-,'; the free; carbon beingu rcmn V outwardly land the @fluid asphaltor {pitch be This.invention}'concerns-itselfwith.utiliz 1'15 ipwithdra n from the centerl'of the The following, stepsand proportion wi llj 5010' ram gs'iaiiiim oii' isheatedjt fuelfloil of laBaum *gravity of about 1 heated to. approx1mate1y 200, degrees FF free::zcarboncakeson thelbottom andt e. as-

m i sph a 1. 11 mas -13"); driven @my f he, carbon.gisc withdrawn 'I Themass gef ashaltic=oili (A,.plil5lB lS1311811 reheated, as

as qpossi-ble to about 549 degrees FL, I, 9 and'Q-hemj at that temperature ifoiifabonfi r .-twenty-fireininutesf A shiny mass'idevelopsl 5 thei batch Thereafter the batohfjslper Q mitte to coolto aboutMOdegrees;F.,,tl1ereby .causing; the Lv shiny .m'ass an-daseparatingg the: p v asphalt ,f i Y e es-aa. he e p ee r p h p p emperature (if-about 89 540 degrees F1 for aboutf fortyfiiie n1 7 Without agitating same} Thebulkfo (presumably 9 melting point,'parti ally d6COnlPQSQIClflSPliflQlt) 1to'solidifysufficiently to permit Withdra v otithefinid asphalt or asphaltic oil (In example, by "raising the temperature of the mass to 'suchla degreethat the mass remains ployed processes for obtaining. asphalt from crude petroleum. During this period of treatment or distillation the lighter" oilyin cluding the fuel oil is distilled off and may be reclaimed and is usable as fuel oil.

7 Althoughit is practicallyand commercially desirable to'raise the temperatures the Various masses in a minimum of time, it is 'not 'essential that the'temperatures be'raised Qquickly, although it is wasteful and slows downthe production, not to raise theftemperatures quickly). Except during the period 1 n be settled out or prec p tated in a r of tlmet- 'The temperatures given are not of fiu'xing of the fuel 'oil and residuum oil, there should. beas little agitation as possible, in order that thefree carbons, when. released from union With the pitch A or asphalt, may

, absolute,'al tlio11gh excellent results area-ttained therefrom. "It is desirablethatthe -residuum oils or products, it is readily' ob- 7 temperature should not exceed 6 00 degrees F. at anystage of the 'processQ v From an'lmtlal charge of 0 gramscf residuum oil and 400 gramsfoflfuel oil, approxnnately 538.15 grams of commercial asphaltic oil may bereclaimed.

f-Althoug'h the inyention is disclosed herein as-relating principally to the tre'atment of *vious that the process may be employed for removing the carbon created during any cracking process of the petroleum. The procl ess may be employed upon fuel oil, whereby to jremove the carbon, whereby theyalue of I suchfuel oil as a fuel is enhanced, or the treated fuel oil may be reduced to any extent, I for example, to commercial asphalt;

What is claimed is:

1 minimum tity of fuel oil heated to approximately 200 degrees F., heating and admixing the resid- V uumoil and fuel oil for fluxing same and continuing the heating and admixing until the temperature of that mass is approximately 340 degrees F retaining the temperature of the mass at approximately 340 degrees F.,

until the'substances' have completely fluxed;

I raising the temperature of the fiuxed mass to 1.;approximately54t0 degrees F., maintaining c the temperature of the mass at approximately 540 degrees F's fora suflicient period of time to permit settling out or precipitation of free carbon, withdrawing the asphaltiooil from the precipitated carbon; heating thewithdrawn asp'haltic oil. to about 54,0 degrees l1, and maintaining same at thattemperature for separating high melting point matter,

cooling the mass to approximately 340 deof the high meltingpoint matter and withdrawing of the asphaltic' oil, reheating the asphaltic' oil to approximately 540 degrees E, to precipitate any additional free carbon 'remaining therein and then reducing the regrees F., to permit congealing or coagulation 785 maining'j 'afsphaltic oil into commercial asphalt. e v r V '3. The process of treating petroleum residuum oil containing asphalt,'acomprising the admixing of approximately five parts ofgresiduum oil at approximately 340 degrees E,

and four parts of approximately fourteen Baume gravity fuel oil' at approximately 200 degrees F., heating the admixture'for attaining fiuxing, thereof, modifying the temperature of the fiu'xedmass forsepar'ating' free Carbon and high melting point matter from the asphaltic oil, and reducing theasphaltic oil to commercial asphalt. f

i In testimony whereof, I have hereunto subscribed my name this 26th day of March, 1928. 7 i RUSSELL P. CROTHERS,

' 1, The process of reclaiming asphalt from 7 asphalticresiduum oil, comprising' heating a1 7 V. mass of such petroleum residuum oil, adding. thereto a quantity of heatedfuel'oil, heating and admixing the residuumoil and fuel oil until they flux, permitting the free carbon to settle out of the 'fluxedmass, Withdrawing; the mass from the precipitated carbon, re- 1 heating and cooling the withdrawn mass and settling out more free carbon and high meltling point asphalt, Withdrawing the mass from such last settled out substances and reducing the last Withdrawn sired consistency. J p 7 2. The process of treating petroleum resimass to the deduum oil containing asphalt, "comprising" heating amass of residuum oil to approxi- 'mately'340 degrees 'F., adding thereto a quan- 

